1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define LOG_NDEBUG 0 18#define LOG_TAG "GraphicBufferListener" 19 20#include <media/stagefright/foundation/ADebug.h> 21#include <media/stagefright/foundation/AMessage.h> 22#include <media/stagefright/MediaErrors.h> 23 24#include <gui/BufferItem.h> 25#include <utils/String8.h> 26 27#include "GraphicBufferListener.h" 28 29namespace android { 30 31status_t GraphicBufferListener::init( 32 const sp<AMessage> ¬ify, 33 size_t bufferWidth, size_t bufferHeight, size_t bufferCount) { 34 mNotify = notify; 35 36 String8 name("GraphicBufferListener"); 37 BufferQueue::createBufferQueue(&mProducer, &mConsumer); 38 mConsumer->setConsumerName(name); 39 mConsumer->setDefaultBufferSize(bufferWidth, bufferHeight); 40 mConsumer->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN); 41 42 status_t err = mConsumer->setMaxAcquiredBufferCount(bufferCount); 43 if (err != NO_ERROR) { 44 ALOGE("Unable to set BQ max acquired buffer count to %zu: %d", 45 bufferCount, err); 46 return err; 47 } 48 49 wp<BufferQueue::ConsumerListener> listener = 50 static_cast<BufferQueue::ConsumerListener*>(this); 51 sp<BufferQueue::ProxyConsumerListener> proxy = 52 new BufferQueue::ProxyConsumerListener(listener); 53 54 err = mConsumer->consumerConnect(proxy, false); 55 if (err != NO_ERROR) { 56 ALOGE("Error connecting to BufferQueue: %s (%d)", 57 strerror(-err), err); 58 return err; 59 } 60 61 ALOGV("init() successful."); 62 63 return OK; 64} 65 66void GraphicBufferListener::onFrameAvailable(const BufferItem& /* item */) { 67 ALOGV("onFrameAvailable() called"); 68 69 { 70 Mutex::Autolock autoLock(mMutex); 71 mNumFramesAvailable++; 72 } 73 74 sp<AMessage> notify = mNotify->dup(); 75 mNotify->setWhat(kWhatFrameAvailable); 76 mNotify->post(); 77} 78 79void GraphicBufferListener::onBuffersReleased() { 80 ALOGV("onBuffersReleased() called"); 81 // nothing to do 82} 83 84void GraphicBufferListener::onSidebandStreamChanged() { 85 ALOGW("GraphicBufferListener cannot consume sideband streams."); 86 // nothing to do 87} 88 89BufferItem GraphicBufferListener::getBufferItem() { 90 BufferItem item; 91 92 { 93 Mutex::Autolock autoLock(mMutex); 94 if (mNumFramesAvailable <= 0) { 95 ALOGE("getBuffer() called with no frames available"); 96 return item; 97 } 98 mNumFramesAvailable--; 99 } 100 101 status_t err = mConsumer->acquireBuffer(&item, 0); 102 if (err == BufferQueue::NO_BUFFER_AVAILABLE) { 103 // shouldn't happen, since we track num frames available 104 ALOGE("frame was not available"); 105 item.mSlot = -1; 106 return item; 107 } else if (err != OK) { 108 ALOGE("acquireBuffer returned err=%d", err); 109 item.mSlot = -1; 110 return item; 111 } 112 113 // Wait for it to become available. 114 err = item.mFence->waitForever("GraphicBufferListener::getBufferItem"); 115 if (err != OK) { 116 ALOGW("failed to wait for buffer fence: %d", err); 117 // keep going 118 } 119 120 // If this is the first time we're seeing this buffer, add it to our 121 // slot table. 122 if (item.mGraphicBuffer != NULL) { 123 ALOGV("setting mBufferSlot %d", item.mSlot); 124 mBufferSlot[item.mSlot] = item.mGraphicBuffer; 125 } 126 127 return item; 128} 129 130sp<GraphicBuffer> GraphicBufferListener::getBuffer(BufferItem item) { 131 sp<GraphicBuffer> buf; 132 if (item.mSlot < 0 || item.mSlot >= BufferQueue::NUM_BUFFER_SLOTS) { 133 ALOGE("getBuffer() received invalid BufferItem: mSlot==%d", item.mSlot); 134 return buf; 135 } 136 137 buf = mBufferSlot[item.mSlot]; 138 CHECK(buf.get() != NULL); 139 140 return buf; 141} 142 143status_t GraphicBufferListener::releaseBuffer(BufferItem item) { 144 if (item.mSlot < 0 || item.mSlot >= BufferQueue::NUM_BUFFER_SLOTS) { 145 ALOGE("getBuffer() received invalid BufferItem: mSlot==%d", item.mSlot); 146 return ERROR_OUT_OF_RANGE; 147 } 148 149 mConsumer->releaseBuffer(item.mSlot, item.mFrameNumber, 150 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR, Fence::NO_FENCE); 151 152 return OK; 153} 154 155} // namespace android 156